Region
Europe, Eastern --
Europe, Eastern
28
Former Soviet republics --
7
Former Soviet republics
5
Russia (Federation) --
4
Soviet Union
3
Soviet Union --
3
Asia
2
Asia --
2
China --
2
Poland --
2
Russia (Federation)
2
China
1
Developing countries --
1
East Asia
1
East Asia --
1
Eastern Europe
1
Europe, Central
1
Europe, Central --
1
Poland
1
Vietnam --
1